revert: re PR c++/35652 (offset warning should be given in the front-end)

revert: re PR c++/35652 (offset warning should be given in the front-end)

Revert:
	PR c++/35652
	2009-03-27  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

gcc/
	* builtins.c (c_strlen): Do not warn here.
	* c-typeck.c (build_binary_op): Adjust calls to pointer_int_sum.
	* c-common.c (pointer_int_sum): Take an explicit location.
	Warn about offsets out of bounds.
	* c-common.h (pointer_int_sum): Adjust declaration.

cp/
	* typeck.c (cp_pointer_sum): Adjust call to pointer_int_sum.

testsuite/
	* gcc.dg/pr35652.C: New.
	* g++.dg/warn/pr35652.C: New.
	* gcc.dg/format/plus-1.c: Adjust message.

From-SVN: r146870